[Xen-devel] [PATCH v7 04/19] x86/VPMU: Make vpmu marcos a bit more efficient

[Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>]

Update macros that modify VPMU flags to allow changing multiple bits at once.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
Acked-by: Kevin Tian <kevin.tian@xxxxxxxxx>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Reviewed-by: Dietmar Hahn <dietmar.hahn@xxxxxxxxxxxxxx>
Tested-by: Dietmar Hahn <dietmar.hahn@xxxxxxxxxxxxxx>
---
 xen/arch/x86/hvm/vmx/vpmu_core2.c | 5 +----
 xen/arch/x86/hvm/vpmu.c           | 3 +--
 xen/include/asm-x86/hvm/vpmu.h    | 9 +++++----
 3 files changed, 7 insertions(+), 10 deletions(-)

diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c 
b/xen/arch/x86/hvm/vmx/vpmu_core2.c
index f5f249f..bf3cd33 100644
--- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
+++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c
@@ -326,10 +326,7 @@ static int core2_vpmu_save(struct vcpu *v)
 {
     struct vpmu_struct *vpmu = vcpu_vpmu(v);
 
-    if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_SAVE) )
-        return 0;
-
-    if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED) ) 
+    if ( !vpmu_are_all_set(vpmu, VPMU_CONTEXT_SAVE | VPMU_CONTEXT_LOADED) )
         return 0;
 
     __core2_vpmu_save(v);
diff --git a/xen/arch/x86/hvm/vpmu.c b/xen/arch/x86/hvm/vpmu.c
index 63765fa..d456aa6 100644
--- a/xen/arch/x86/hvm/vpmu.c
+++ b/xen/arch/x86/hvm/vpmu.c
@@ -143,8 +143,7 @@ void vpmu_save(struct vcpu *v)
     struct vpmu_struct *vpmu = vcpu_vpmu(v);
     int pcpu = smp_processor_id();
 
-    if ( !(vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) &&
-           vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED)) )
+    if ( !vpmu_are_all_set(vpmu, VPMU_CONTEXT_ALLOCATED | VPMU_CONTEXT_LOADED) 
)
        return;
 
     vpmu->last_pcpu = pcpu;
diff --git a/xen/include/asm-x86/hvm/vpmu.h b/xen/include/asm-x86/hvm/vpmu.h
index 40f63fb..7cd7266 100644
--- a/xen/include/asm-x86/hvm/vpmu.h
+++ b/xen/include/asm-x86/hvm/vpmu.h
@@ -81,10 +81,11 @@ struct vpmu_struct {
 #define VPMU_CPU_HAS_BTS                    0x200 /* Has Branch Trace Store */
 
 
-#define vpmu_set(_vpmu, _x)    ((_vpmu)->flags |= (_x))
-#define vpmu_reset(_vpmu, _x)  ((_vpmu)->flags &= ~(_x))
-#define vpmu_is_set(_vpmu, _x) ((_vpmu)->flags & (_x))
-#define vpmu_clear(_vpmu)      ((_vpmu)->flags = 0)
+#define vpmu_set(_vpmu, _x)         ((_vpmu)->flags |= (_x))
+#define vpmu_reset(_vpmu, _x)       ((_vpmu)->flags &= ~(_x))
+#define vpmu_is_set(_vpmu, _x)      ((_vpmu)->flags & (_x))
+#define vpmu_are_all_set(_vpmu, _x) (((_vpmu)->flags & (_x)) == (_x))
+#define vpmu_clear(_vpmu)           ((_vpmu)->flags = 0)
 
 int vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content);
 int vpmu_do_rdmsr(unsigned int msr, uint64_t *msr_content);
-- 
1.8.1.4


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